Make the judgement on the statement that you should make the complaint courteously and objectively.

Make the judgement on the statement that you should make the complaint courteously and objectively. （发起投诉时的语气要礼貌客观。这种说法是否正确。)

Even when you have doubts about some people, act as if they are worthy of your best manners.() A: Although some people are rude to you, you should still he polite to them. B: Even when you suspect some people, behave courteously as if you like them. C: Even when you are not sure whether some people deserve your politeness, treat them as if they do. D: Although you don’t trust some people, you should show your politeness to them as if they are trustworthy.